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Method of reducing casting defect for casting part in casting process

A technology for casting defects and castings, applied in the direction of casting molding equipment, casting molds, casting mold components, etc., can solve problems that affect processing operations, incomplete shakeout, small adaptability, etc., to reduce difficulty and production costs, and achieve good economy Benefits, the effect of improving adaptability

Inactive Publication Date: 2012-08-08
洛阳古城机械有限公司
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  • Description
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AI Technical Summary

Problems solved by technology

[0008] The current sand shakeout process scheme has little adaptability: if the sand shakeout time is short, the castings will have less bump damage, but there will be too much residual sand in the inner cavity of the casting, resulting in incomplete shakeout, which seriously affects subsequent processing operations; if the shakeout time is long, The number of knocked castings has increased significantly, and the scrap rate has risen sharply. Among them, bumps account for 92.5% of the total number of scraps, and crack defects caused by bumps account for 1.8% of the total number of scraps.

Method used

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  • Method of reducing casting defect for casting part in casting process
  • Method of reducing casting defect for casting part in casting process
  • Method of reducing casting defect for casting part in casting process

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Embodiment Construction

[0026] A method to reduce casting defects in the casting process of castings, such as Figure 5 Shown, compared to Figure 4 In the process layout of the existing mold, a support column 1 is added to the mold casting system. After the mold is installed on the molding machine, there is a cavity for the support column in the cavity of the sand making, which is formed on the casting system 2 after being poured After the mold (sand mold, castings and its pouring system) is fed into the sand-shaking equipment by the conveyor belt, the supporting column is added to the pouring system, no matter how the vibrating drum shake-out bed vibrates and rotates, such as Image 6 As shown, the support pillars at the four corners of the casting will be firmly in contact with the roller wall, thereby reducing or avoiding the occurrence of bumps, and the crack defects caused by the bumps have been eliminated.

[0027] Such as Figure 7 , Among them, the support column is 20-50mm higher than the outer ...

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Abstract

The invention discloses a method of reducing a casting defect for a casting part in casting process. The method is achieved by: a cavity of a supporting column formed in a mold cavity during molding process of the casting part and a supporting column entity formed on a pouring system after pouring with the material of the supporting column entity being the same with that of the casting part. The method enables the casting part never to directly contact shakeout equipment, the latter inputted casting part and the pouring system, thereby avoiding crack defect caused by collision.

Description

Technical field [0001] The present invention relates to the field of casting technology, in particular to a method for reducing casting defects in the casting process of castings. Background technique [0002] In the ordinary sand casting process, after the casting is poured in the cavity, the sand falling operation can be performed when it is cooled to a certain temperature range. [0003] In the process of casting sand falling, the mold (sand mold, casting and its pouring system) is fed into the sand falling equipment by the conveyor belt, and the sand falling bed is continuously vibrated and rolled in a circle through the vibrating drum, so that the sand mold is broken and falls below The used sand conveyor belt of the steel, and then the castings and its pouring system are constantly being tumbling, and the falling sand iron stars in the drum keep hitting the castings and its pouring system until they are transported out of the falling sand drum within the specified time. Real...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C9/02B22C21/14
Inventor 王新乐王永涝任现伟
Owner 洛阳古城机械有限公司
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